JP2004132593A - Air cleaning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air cleaning system capable of preventing the prolonged discomfort of a person present in a room by realizing the optimization of air conditioning efficiency. <P>SOLUTION: This air cleaning system has an air cleaner body 17 having a sucking blower 13 for sucking foul air in the room 11, a dust collecting/deodorizing means 15 for cleaning the foul air 12 and removing dust to make the air purified air 14, and a first fouling degree detection means 16 for detecting the fouling degree of the air, the detection means being provided on the front stage side of the air flow of the dust collecting/deodorizing means 15; an external ventilation device 20 for replacing the inside air 12 with the outside air 19; and a control means 21 for controlling the sucking blower and the ventilation device according to the detection result of fouling degree. This system further has a second fouling degree detection means 22 for detecting the fouling degree of the purified air on the rear stage side of the dust collecting/deodorizing means 15 and controls the rotation speed of the sucking blower13 and the working frequency of the external ventilation device 20 based on fouling degree dtected by the first and secod fouling degree detection means 16, 22. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an air purifying system that efficiently purifies indoor air by linking an air purifier and a ventilation device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in order to purify indoor air, for example, an air purifying apparatus for purifying indoor air by collecting dust by high pressure discharge, filtering by an air filter, or adsorbing particles by activated carbon or the like. Has been put to practical use. For example, a high-pressure discharge type air cleaning device is provided with a high-voltage dust collector, and smoke and dust contained in air forcibly introduced into the air cleaning device are attached to the electric dust collection unit by static electricity to clean the indoor air. It is equipped with a dirt sensor to check the concentration of smoke and dust in the air.The voltage of the high-voltage dust collector is switched according to the concentration detected by the dirt sensor, and the amount of air introduced Are switched in multiple stages.
[0003]
Furthermore, in order to increase the efficiency of air purification and achieve comfortable air conditioning, heat exchange is performed between the air supplied from the outside to the room and the air exhausted from the room to the outside. There is used a system that includes a heat exchange ventilator that supplies outside air with a reduced temperature difference to the room and that is linked to an air purifier. The following control is usually performed by the system linked in this manner.
[0004]
When the indoor air becomes dirty, the dirt sensor of the air purifying device is activated, and the operation of the air purifying device is started. At the same time, the on / off of the heat exchange ventilator and the air volume are selected according to the detection level of the dirt sensor. For example, when the detection level of the dirt sensor is low, the air exchange device is operated at a stage corresponding to the dirt level without operating the heat exchange ventilator. When the detection level of the dirt sensor increases, the air exchange device alone has insufficient dust collecting capability, so the heat exchange ventilator is operated, and the air flow of the heat exchange ventilator is set to, for example, "L (low speed)" according to the degree of dirt. )) To “M (medium speed)” and “H (high speed)”.
[0005]
In addition, in order to predict the degree of reduction in the dust collecting capacity of the air purifying device due to long-term use, the accumulated use time is stored in the storage means, and one of the air purifying device and the ventilation device is stored in accordance with the stored time. It has been proposed to shorten the predetermined time T for determining the timing for increasing one or both air cleaning capabilities. As a result, as the reduction of the dust collecting capability of the air purifying device is large, the air purifying capability of one or both of the air purifying device and the ventilation device is quickly enhanced, and the time from when the air becomes dirty until the air becomes sufficiently clean is increased. Can be made substantially constant irrespective of the dust collecting ability of the air cleaning device (Patent Document 1).
[0006]
[Patent Document 1]
Japanese Patent No. 3180374
[Problems to be solved by the invention]
However, as the air purifier continues to be used for many years, the cleaning ability is reduced. As a result, when the air cleaner and the ventilation measure are controlled using the same determination value, a reduction in the cleaning ability may occur.
In other words, if the control of turning on / off the air cleaning device and the ventilation device is performed by using the same determination unit, the cleaning time of the indoor air increases due to the reduction of the cleaning ability of the air purifier, and the indoor air becomes longer. There is a problem that the discomfort of those who are there is also longer.
[0008]
In the device proposed in Patent Document 1 as well, a decrease in the cleaning performance of the air purifying device is predicted by the integrated use time or the ionization current. However, the decrease in the cleaning performance greatly changes depending on the use environment such as generated dust and humidity. Therefore, a situation different from the actual drop occurs, or the power is increased more than necessary and power is wasted, and conversely, the capacity is drastically insufficient, and the discomfort of the person in the room also becomes longer, there is a possibility.
[0009]
The present invention has been made in view of the above problems, and an object of the present invention is to provide an air purifying system that realizes optimization of air conditioning efficiency and does not increase the discomfort of a person in a room.
[0010]
[Means for Solving the Problems]
A first invention of the present invention for solving the above-mentioned problems is a suction blower for sucking dirty air in a room, a dust collecting / deodorizing means for cleaning and removing dust from the dirty air, and a dust collecting / deodorizing means. An air purifier main body provided on the upstream side of the air flow of the means and having first contamination degree detecting means for detecting the degree of contamination of the air, and external ventilation for exchanging external air with indoor air In an air cleaning system having an apparatus and control means for controlling a suction blower and a ventilation device based on the detection result of the degree of contamination, a second step of detecting the degree of contamination of air is provided at a stage subsequent to the dust collecting / deodorizing means. Having a degree of contamination detection means, and controlling the number of rotations of the suction blower and the operation frequency of the external ventilation device based on the degree of contamination of the air in both the first degree of contamination detection means and the second degree of contamination detection means. An air purification system characterized by the following.
[0011]
A second invention is the air cleaning system according to the first invention, wherein the first and second dust collecting and deodorizing means are gas sensors.
[0012]
A third invention is the air cleaning system according to the first invention, wherein the first and second dust collecting and deodorizing means are smoke sensors.
[0013]
In a fourth aspect based on the first aspect, the first and second dust collecting and deodorizing means include a gas sensor and a smoke sensor, and the weighted average value of the dust sensor and the deodorizing means and the external ventilation device are used. The air purifying system is characterized in that the operation switching determination value for switching the operation is changed.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the contents of the present invention will be described in detail with reference to embodiments of the present invention, but the present invention is not limited thereto.
[0015]
[First Embodiment]
FIG. 1 is a schematic diagram of an air cleaning system according to the present embodiment.
The air cleaning system according to the present embodiment includes a suction blower 13 that suctions dirty air 12 in a room 11, and a dust collecting / deodorizing unit 15 that cleans the dirty air 12 and removes dust to form purified air 14. An air purifier main body 17 provided on the upstream side of the air flow of the dust collecting / deodorizing means 15 and including a first contamination degree detecting means 16 for detecting the degree of contamination of the air; An air purification system comprising: an external ventilation device 20 for exchanging external air 19 from the room with indoor air 12 in the room 11; and a control means 21 for controlling a suction blower and a ventilation device based on the detection result of the degree of contamination. On the downstream side of the dust / deodorizing means 15, there is provided a second dirty degree detecting means 22 for detecting the dirty degree of the air after purification, and the first dirty degree detecting means 16 and the second dirty degree detecting means 22 are provided. Suction blower from the degree of contamination And controls the operation frequency of the third rotation speed and external ventilation device 20.
[0016]
Here, the dust collection / deodorization means 15 may use a known air cleaning means, and the external ventilation device 20 performs a known ventilation device for exchanging outside air with room air, and a heat exchange between external air and room air. A well-known heat exchange type ventilator may be used, and there is no limitation.
[0017]
Further, the first and second contamination degree detecting means 16 and 22 detect the degree of contamination of air, and examples thereof include a gas sensor and a smoke sensor.
The gas sensor exerts an effect on the gas concentration of the air contamination, and the smoke sensor exerts an effect on the dust concentration of the air contamination.
Further, it is preferable that both the first and second contamination degree detecting means 16 and 22 use a gas sensor and a smoke sensor.
Furthermore, only the first contamination degree detecting means may be of a different type.
[0018]
According to the above air cleaning system, the degree of contamination of the air in the room 11 is detected in real time by the first contamination degree detecting means 16 during the air cleaning operation, and is transmitted to the control means 21 as a contamination degree detection signal a. . Next, after detecting the contamination degree signal a, the control means 21 internally determines the rotation speed of the suction blower 13 corresponding to the environment of the room 11, and uses the switching signal x to rotate the suction blower of the air purifier. Control the number.
[0019]
The control means 21 internally determines whether the dedicated power supply of the external ventilation device 20 is turned on or off, outputs a switching signal y to the ventilation device, and activates the ventilation device when the switching signal y is “on”. Let me. On the other hand, when the switching signal y is “OFF”, the ventilation device is stopped.
[0020]
At this time, as shown in FIG. 2, the first contamination degree detecting means 16 and the second contamination degree detecting means 22 detect the contamination degree of the dirty air 12 in the room 11 and the dust collecting / deodorizing means 15 together. The degree of contamination of the air passing through is detected (S-101). Then, based on these results, the “current air cleaning ability” and the “past air cleaning ability” are weighed (S-102). Next, if they do not match (Yes), the determination reference value is changed (S-103). If they match (No), the purification is continued based on the same criterion.
[0021]
Specifically, a contamination degree signal a from the detection result of the first contamination degree detection means 16 and a contamination degree signal b from the detection result of the second contamination degree detection means 22 are used for a certain period (for example, 5 minutes). Then, the cleaning ability at a certain number of times (for example, 10 times) is calculated. Then, as shown in FIG. 3, the calculated result is stored in advance in a memory means built in the control means 21 and compared with the cleaning ability. The preset reference value serving as a criterion for determining the rotation speed of the suction blower 13 and the operation frequency of the external ventilation device is changed to meet the minute, and air purification is performed based on the new criterion.
[0022]
Here, the calculation of the cleaning ability is performed as follows.
(Dirty degree signal a of first dirt degree detecting means 16-dirt degree signal b of second dirt degree detecting means 22) / dirty degree signal a × 100 (%) of first dirt degree detecting means 16
Thus, the control of the rotation speed of the suction blower 13 of the air purifier (control signal x) and the control of the operation frequency of the external ventilator 20 (control signal) are performed in accordance with the actual degree of change in the cleaning performance of the air purifier body 17. y) to optimize air cleaning.
Therefore, it is possible to efficiently purify the air in accordance with the degree of contamination and in accordance with the deterioration of the air purifier due to the use environment, without increasing the discomfort of persons in the room, and improving the air conditioning efficiency. Optimization can be achieved.
[0023]
Further, when the degree of contamination of the room 11 is large, the control as shown in FIG. 4 may be further added to perform the purification.
[0024]
As shown in FIG. 4, the degree of contamination of the indoor air is detected by the first degree of contamination detection means 16 (S-201). The operation status of the external ventilation device 20 is confirmed (S-202).
When the external ventilation device 20 is operating (Yes), it is determined whether or not the degree of air contamination is equal to or less than a stop threshold value of the ventilation device (S-203). As a result, if the value is equal to or smaller than the threshold (Yes), the operation power of the external ventilation device is turned off (S-204), and the ventilation is stopped. On the other hand, if it is equal to or greater than the threshold value (No), the degree of contamination is severe, so that the operation power supply of the external ventilation device is turned on, and ventilation is continued.
[0025]
When the ventilator is not operating (No), it is determined whether or not the degree of air contamination is equal to or higher than the stop threshold of the ventilator (S-205). As a result, if it is equal to or greater than the threshold (Yes), the operation power of the external ventilation device is turned on, and ventilation is started (S-206). On the other hand, when the value is equal to or less than the threshold value (No), the degree of contamination is not severe, and there is no need to operate the external ventilation device.
[0026]
[Second embodiment]
Next, a description will be given of a second embodiment in which a gas sensor and a smoke sensor are used as sensors in the first contamination degree detecting means 16.
As shown in FIG. 5, a signal obtained by multiplying the gas concentration signal Sg from the gas sensor 30 and the dust concentration signal Sd from the smoke sensor 31 by a multiplier of m and n is added to obtain a contamination degree signal a. Like that.
[0027]
At this time, 0 <m, n <1, and a weighted average is obtained by setting m and n so as to satisfy m + n = 1. When the weighted average value is equal to or greater than a specified value, the rotation speed of the suction blower 13 is increased or the external ventilation device 20 is operated. When the weighted average value is equal to or less than the specified value, the rotation speed of the suction blower 13 is reduced or the external ventilation device 20 is stopped. Or let it.
[0028]
Thereby, the gas concentration is also detected when air pollution, especially when one or both of the gas concentration and the dust concentration are high, and also after reducing the output fluctuation due to a sudden change in humidity specific to the gas sensor, Since it becomes possible to change the cleaning capacity of the air purifying apparatus, the on / off operation of the ventilation apparatus, or both of the operation switching determination values based on the actual cleaning capacity change of the air purifying apparatus, The air conditioning efficiency can be optimized without increasing the discomfort of the person in the room.
[0029]
【The invention's effect】
As described above, the first invention includes a suction blower for sucking dirty air in a room, a dust collecting / deodorizing means for cleaning and dedusting the dirty air, and a dust collecting / deodorizing means. An air purifier main body provided on the upstream side of the flow of air and having first contamination degree detecting means for detecting the degree of contamination of the air; an external ventilation device for exchanging external air with room air; A control unit for controlling a suction blower and a ventilation device based on the detection result of the degree of contamination, wherein a second degree of contamination for detecting the degree of contamination of air is provided downstream of the dust collecting / deodorizing means. Since it has a detecting means and controls the rotation speed of the suction blower and the operation frequency of the external ventilation device based on the degree of contamination of the air of both the first contamination degree detecting means and the second contamination degree detecting means, Air purifier based on the change in the cleaning capacity of the air purifier It is possible to change the operation switching determination value of one or both of the cleaning ability and the operation frequency of the ventilation device, and it is possible to optimize the air conditioning efficiency without increasing the discomfort of a person in the room. .
[0030]
According to a second aspect of the present invention, in the first aspect, since the first and second dust collecting / deodorizing means are gas sensors, the first and second dust collecting / deodorizing means are based on a change in the actual cleaning ability of the air cleaning apparatus with respect to air contamination, especially gas concentration. It is possible to change the operation switching judgment value of either or both of the air purifying device's cleaning capacity and the ventilation device's operating frequency, and it does not increase the discomfort of people in the room and realizes optimization of air conditioning efficiency can do.
[0031]
According to a third aspect, in the first aspect, since the first and second dust collecting and deodorizing means are smoke sensors, the first and second dust collecting / deodorizing means are based on a change in the cleaning ability of the actual air cleaning device with respect to air contamination, especially dust concentration. It is possible to change the operation switching judgment value of one or both of the cleaning performance of the air purifying device and the operation frequency of the ventilating device, so that the discomfort of the person in the room does not become long, and the air conditioning efficiency is optimized. Can be realized.
[0032]
In a fourth aspect based on the first aspect, the first and second dust collecting and deodorizing means include a gas sensor and a smoke sensor, and the weighted average value of the dust sensor and the deodorizing means and the external ventilation device are used. Since the operation switching judgment value for switching the operation is changed, the output due to a sudden change in the humidity, particularly when one or both of the gas concentration and the dust concentration are high, and when the humidity is peculiar to the gas sensor. The gas concentration is also detected after the fluctuation is reduced, and based on the actual change in the cleaning performance of the air cleaning device, the cleaning performance of the air cleaning device and the judgment value for switching the operation of one or both of the on / off operation of the ventilation device Can be changed, so that the discomfort of the person in the room does not increase, and the air conditioning efficiency can be optimized.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of an air cleaning system according to a first embodiment.
FIG. 2 is a flowchart of a criterion of the first embodiment.
FIG. 3 is a diagram showing a relationship between a reference value for determining the degree of contamination and a cleaning ability.
FIG. 4 is a flowchart of another determination criterion of the first embodiment.
FIG. 5 is a schematic diagram of an air cleaning system according to a second embodiment.
[Explanation of symbols]
Reference Signs List 11 Indoor 12 Indoor air 13 Suction blower 14 Purified air 15 Dust collecting / deodorizing means 16 First contamination degree detecting means 17 Air purifier main body 18 External 19 External air 20 External ventilation device 21 Control means 22 Second contamination degree detecting means

Claims (4)

A suction blower for sucking dirty air in the room, a dust collecting / deodorizing means for cleaning and removing dust from the dirty air, and a dust collecting / deodorizing means provided on a front side of an air flow of the dust collecting / deodorizing means. An air purifier main body having first contamination degree detecting means for detecting the degree of contamination, an external ventilation device for exchanging external air with room air, a suction blower and ventilation based on the detection result of the degree of contamination. Control means for controlling the device, in the air purification system,
A second contaminant detection means for detecting the degree of contamination of the air is provided downstream of the dust collecting / deodorizing means, and both of the first contaminant detection means and the second contaminant detection means are provided with air. An air cleaning system characterized by controlling the number of rotations of a suction blower and the operation frequency of an external ventilation device based on the degree of contamination. In claim 1,
An air cleaning system, wherein the first and second dust collecting / deodorizing means are gas sensors. In claim 1,
The first and second dust collecting / deodorizing means are smoke sensors. In claim 1,
The first and second dust collecting and deodorizing means include a gas sensor and a smoke sensor, and use the weighted average value of these to determine an operation switching determination value for switching the operation between the dust collecting and deodorizing means and the external ventilation device. An air purification system characterized by changing.

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